Process of forming brake-rings.



J. F. SMITH & G. H WILLIAMS.

PROCESS OF FORMING BRAKE RINGS.

APPLICATION FILED DEC.14,1915.

1320,4770. Patented Man 27,1917.

Mai;

A TTOR/VE) OF WASHINGTON.

PROCESS OF FORMING BRAKE-BIN GS.

Laeomo.

Specification of Letters Patent.

Patented Mar. 27, 11917.

To all whom it may concern.-

Be it known that we, JOHN F. SMITH I and GUY H. WILLIAMS, citizens of the United ings, numeral 1 indicates States, and residents of Seattle, in the county of King and State vented certain new and useful Improvements in Processes of Forming Brake-Rings, of which the following is a full, true, and exact specification.

his invention relates toa process of manufacturing brake rings from steel T iron and has for its principal objecflto render the process of manufacture of brake rmgs cheaper and more rapid; to provide a superior brake ring as to quality of material. In the manufacture of brake rings, cast iron is generally usedwhich possesses little tensile strength, deforms in casting, requires machine finishing, etc. By means of our process, a brake ring is formed in halves from a piece of T iron by cold cutting and forming. The accompanying drawings illustrate our brake ring process.

In the drawings, Figure 1 is a plan View of a complete brake ring. Fig. 2 is a half sectional elevation of Fig. 1. Fig. 3 is a detail showing the end of the T iron before bending.

Referring more particularly to the drawthe flange of a T v iron and 2 the web. When completed the brake ring is in the form of apair of similar semi-circular members of T iron With the flange outward. Friction wearing strips 3 are secured to the outside of the ring. Two of the adjacent ends of the semi-circular members are cut away on the web as at 4 and the end of the flange bent up at right angles against the end of the web. The other adjacent ends have semi-circles punched from them so that when the ends of Washington, have in i are brought together, a complete hole as at 5 is formed. Both semi-circular members are cut away centrally on the web as at 6. In our process the length of material is first cut from stock, the end of the web cut away as at 4 and the flange end bent up. The opposite end is punched as at 5 and the web cut away as at 6. stamped to receive springs 8.

Our brake rings may be formed forging or by other hot processes, but I prefer cold cutting and forming as it increases the tensile resistance of the metal.

aims:

l. The process of forming semi-circular brake rings from T iron, consisting in cutting away the web at one end of the piece of T iron, bending the flange of the T back at right angles and against the end of the web, cold bending the piece of T iron into a semicircular form with the web innermost, punchby drop 1ng an open semi-circular notch in the end of the web opposite the said cut away end, and shearing away an edge portion of the web midway between the two ends.

2. The process of forming semi-circular brake ring members, consisting in bending a piece of T iron in a semi-circle with the web innermost, cutting away a square portion of the web of the T iron at( one end of the semi-circular member and bending the free end of the flange against the end of the web and on a diainetrical line, punchin an open semi-circular notch in the web 0 the other end of the semi-circular member, and shearing a crescent shaped piece from the edge of the web midway of the ends of the semi-circular member.

JOHN F. SMITH. GUY HEWILLIAMS.

Holes 7 may also be, 

